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API Contract Test Pack

Tests that fail the build when an endpoint changes shape, so back-end releases stop breaking your clients.

Price incl. GST
₹18,999
Timeline
9 working days
Deliverables
7 listed below

Overview

About this service

Front-end and mobile teams break not because an API went down, but because a field quietly became nullable. Contract tests catch that. We build a suite that validates every response against its schema, checks status codes and error formats, and asserts the authorisation rules that matter, such as one customer being unable to fetch another customer's record. The suite runs on every pull request, so a breaking change is a failing build rather than a support ticket from a partner three weeks later.

Deliverables

What you receive

7 items
  1. 01 Contract tests for up to 40 endpoints validated against the schema
  2. 02 Status code, error format and header assertions per endpoint
  3. 03 Authorisation tests confirming role boundaries and object-level access
  4. 04 Negative tests covering malformed input and missing fields
  5. 05 CI integration with clear reporting on which contract broke
  6. 06 Schema snapshots so unintended changes are visible in a diff
  7. 07 Documentation on adding tests for new endpoints

Benefits

Why it is worth doing

  • Breaking changes fail in CI instead of on a customer device

  • Refactoring becomes safe because the contract is enforced

  • Shipped mobile clients stop breaking on server releases

Process

How the work is carried out

  1. 1

    Baseline

    Endpoints catalogued and current response shapes captured

  2. 2

    Specify

    Expected contracts confirmed with your engineers, gaps flagged

  3. 3

    Build

    Tests written per endpoint, including negative and authorisation cases

  4. 4

    Integrate

    Suite added to CI and demonstrated with a deliberate break

Best suited to

  • Teams with a mobile app that cannot be updated as fast as the server
  • Products with external partners consuming the API
  • Backends where refactoring is avoided out of fear

What we need from you

  • API access with credentials for each role
  • An OpenAPI specification if you have one, though we can work without
  • An engineer to confirm intended behaviour where it is ambiguous

You can share these from your order page after checkout. The timeline starts once they are received.

FAQ

Questions about this service

No. Unit tests check internal logic. These check the promise your API makes to everyone consuming it.

We capture current behaviour and confirm what is intentional. That process usually finds a few surprises.

Yes, through schema and query-level assertions. Same approach, same price.

Have a question before you order?

Tell us about your project and we will confirm whether this service fits, or suggest a better option.

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This is a professional service delivered remotely; nothing is physically shipped. See the Delivery Policy and Refunds & Cancellation for how delivery, delays and refunds are handled.

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Next step

Have something to build, fix or modernise? Start with a conversation.

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